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System and method for monitoring rotor blade health of wind turbine

A technology of rotor blades and wind turbines, which is applied in the monitoring of wind turbines, wind turbines, engines, etc., and can solve problems such as expensive systems and inability to detect blade cracks

Pending Publication Date: 2022-07-22
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such methods cannot be used to detect hidden blade cracks
Other methods for detecting blade damage could include fiber optic sensing or paired antennas, but such systems are very expensive

Method used

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  • System and method for monitoring rotor blade health of wind turbine
  • System and method for monitoring rotor blade health of wind turbine
  • System and method for monitoring rotor blade health of wind turbine

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Embodiment Construction

[0022] Reference will now be made in detail to the embodiments of the present invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided by way of illustrating the invention, not by way of limiting it. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the inventions. For example, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Therefore, it is intended that this invention covers such modifications and variations as come within the scope of the appended claims and their equivalents.

[0023] For many wind turbines, certain control algorithms are implemented to reduce the tension on the rotor blades and tower during operation when the corresponding wind-generated power exceeds a threshold. For a wind turbine in ...

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PUM

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Abstract

A method for monitoring at least one rotor blade of a wind turbine includes implementing, via a controller, a control scheme for monitoring blade damage of the at least one rotor blade. The control scheme includes monitoring at least one electrical condition of a pitch system of the wind turbine. The method also includes transforming the electrical condition (s) of the pitch system into the frequency domain. Further, the method includes determining one or more peaks in the frequency domain around a frequency component associated with the natural frequency of the rotor blade. Further, the method includes determining a frequency deviation between one or more peaks of the frequency domain and a frequency component associated with the natural frequency of the rotor blade. As such, frequency deviations outside the predetermined frequency range indicate rotor blade anomalies. Thus, the method comprises implementing a control action when the frequency deviation is outside a predetermined frequency range.

Description

technical field [0001] The present disclosure relates generally to wind turbines, and more particularly to systems and methods for monitoring rotor blade health of wind turbines, eg, using pitch motor current. Background technique [0002] Wind power is considered to be one of the cleanest and greenest energy sources currently available, and wind turbines are receiving increasing attention in this regard. Modern wind turbines typically include a tower, generator, optional gearbox, nacelle and one or more rotor blades. The rotor blades capture kinetic energy from the wind using known airfoil principles and transfer the kinetic energy through rotational energy to turn a shaft that couples the rotor blades to a gearbox or, if no gearbox is used, directly to a generator. The generator then converts the mechanical energy into electrical energy, which can be deployed to the utility grid. [0003] During operation of a wind turbine, its components are subjected to various loads. ...

Claims

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Application Information

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IPC IPC(8): F03D17/00
CPCF03D17/00Y02E10/72F03D80/50
Inventor 贺力君M·阿蒂亚方飙郝立伟K·杨西王宏刚
Owner GENERAL ELECTRIC CO